Caller: "Yes, I’m using version 12" *note: the highest version of Firefox is currently 3.6*

Me:*jokingly* "Firefox 12? That must mean you’re from the future! Wow! What’s the new Firefox like? In my time, we only have version 3.6."

Caller: "It’s pretty nice, I guess."

Me:*still jokingly* "Do you have hover-cars yet?"

Caller: "Um…"

Me: "Sorry, that was a joke. What I want you to do is email me a screen capture of the bug you’re experiencing, as well as of the specific version of Firefox you’re using. I can give you instructions on how to do so."

(30 minutes later I receive an email with the screen captures. Turns out she was using Internet Explorer 7.)